I have the whole system with the plastic cup and all. I like having all of my hydration, cooking and water purifying gear together. I did not buy the carrying case. $30 for a nylon pouch was a little extreme for me. Instead I went to the local military surplus store and bought a molle style canteen pouch. They have a flap that goes over the top of the pouch and an adjustable strap that holds the flap down. If you don't mind having a bit of the canteen showing, the molle pouch holds the cup, canteen, canteen cook cup and the stove. It also has two small exterior pouches for fire starting, small fuel tabs, or water purification tabs. The molle pouch cost me $10.